How to open the brush:
Answer:[Open the brush]The brush should be moistened with alcohol because there will be some cotton glue on the surface of the brush when it leaves the factory, which will affect its use.
[Wash the brush](1) For paint brushes, they should be cleaned with clean water before and after use. If there is any paint residue, you can use brush cleaning water. Do not use nail polish remover to wash the brush, as it will damage the brush hair.
(2) For glue brushes, moisten the brush with primer or sealant before each use, then clean it with alcohol before using the paint glue. After use, clean it immediately, otherwise the brush tip will become hard and damage the brush hair.